Home Shop Machinists Podcast – Episode 9 – We Are Finished!

In this episode Max and Justin talk about finishing and both agree that they are terrible at actually finishing projects.  In fact, it is amazing that this podcast is still being recorded and not sitting on a shelf somewhere collecting dust waiting for completion.  It did actually sit for about a week until Justin managed to finish the editing!  In this episode:

You can listen to it directly here:

or you can download it directly.

Subscribe in iTunes (and please rate us!): https://itunes.apple.com/ca/podcast/home-shop-machinists-podcast/id1180854521

Max’s website: The Joy of Precision and also his Youtube channel:  https://www.youtube.com/channel/UCdMt_havo3BxZJscvRCOGcw Max’s Instagram: https://www.instagram.com/joyofprecision/

Justin’s Youtube channel: https://www.youtube.com/thecogwheel  Justin’s Instagram: https://www.instagram.com/thecogwheel/

Shop Made Quick Change Toolpost

A few weeks ago now I finished a quick change toolpost for the Schaublin.

The design is based on Andy Lofquist’s MLA-23 toolpost.  Andy is the man behind the wonderful Metal Lathe Accessories kits (http://www.statecollegecentral.com/metallathe/).  While I’ve never ordered any kits from Andy, I’m told that they are very high quality and are exceptionally thought out.

After quickly considering a Tripan toolpost and changing my mind after I saw the prices on those I ordered a set of drawings for the MLA-23 toolpost.  The original design is for 9″-12″ swing lathes.  The Schaublin is an 8″ swing lathe.  After drawing up the original toolpost in Fusion and drawing up the Schaublin cross slide it was evident that it was too big.  I decided to design a scaled down version, making some changes along the way.

The largest change is in the dovetail size and the shape of the body itself.  I wanted something that would match the Schaublin’s size, but also look, so I manufactured the body out of round material instead of square.  The toolpost is optimized for 1/4″ HSS tools, but 5/16″ will fit.

The internal workings are that of the MLA-23 toolpost.  The design is exceptionally rigid and works very well.  It is also a wonderfully simple in design.  Part of the reason I really like this design is for its simplicity.  I believe the best design is one that doesn’t allow you to take anything away.  This design, in my opinion, is one of those designs.

Some people don’t like that the toolpost doesn’t repeat in angle position – that is once you loosen the locking handle you completely loose the rotational position of the toolpost.  This is a downfall of the design if you truly need rotational position repeatability.  When I work in the shop I’m constantly moving the toolpost around to allow for tool clearance.  So much so that I made a handle for my Aloris clone on my 10×18 lathe a number of months ago.  I do have provisions in the design to allow for graduations on the base to allow for visual rotational positioning.  We’ll see if I add it.

The build was interesting and fun.  I learned a number of things along the way including how to cut dovetails on the shaper.  It took a bit of time, but it reaffirmed the very useful nature of having a shaper in the shop.  Instead of waiting for a dovetail cutter I could grind up a simple tool and cut nice dovetails, at any angle, and get a super finish.  I’m told you can build the entire toolpost with a lathe, but there is a fair bit of milling work so even a mini mill would be a huge help.

Since the design borrows heavily from Andy’s design I don’t want to release drawings.  What I’m planning on doing is forwarding a set of drawings to Andy to include with his prints if he is interested.  So if you want to build the smaller version, which is a perfect size for the mini lathe, send me an email and I’ll try to get you a set of drawings.

I made a build video of the entire toolpost in montage style format as well.